Hi! > > We send fake signals to them, so they enter get_signal_to_deliver() and they > > call try_to_freeze() from there. > > Well then, see, you're doing exactly what you said should never happen -- > you are freezing a user thread while it might be holding a lock that the > unfreezable usb-storage thread needs. I do not think it is okay to call get_signal_to_deliver with *any* lock held... Or do you have example when that is broken? Pavel -- Thanks for all the (sleeping) penguins.